EP 1149924 A3 20040128 - Grain-oriented electrical steel sheet excellent in magnetic properties
Title (en)
Grain-oriented electrical steel sheet excellent in magnetic properties
Title (de)
Kornorientiertes Elektroblech mit ausgezeichneten magnetischen Eigenschaften
Title (fr)
Tôle d'acier à grains orientés présentant d'excellentes caractéristiques magnétiques
Publication
Application
Priority
JP 2000123250 A 20000424
Abstract (en)
[origin: EP1149924A2] The present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, which are improved by irradiating laser beams onto the positions paired on the both surfaces of the steel sheet and forming fine closure domains, characterized in that the width of the closure domains in the rolling direction is 0.3 mm or less and the deviation in the rolling direction between the positions of the paired closure domains on the both surfaces is equal to or smaller than the width of said closure domains in the rolling direction. Further, the present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, characterized in that the steel sheet has the marks of laser irradiation on its surface. Yet further, the present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, characterized in that the substrate steel is not exposed at the portions of laser irradiation on the surface of the steel sheet. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
C21D 1/09 (2013.01 - KR); C21D 8/1294 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP US); C21D 2221/00 (2013.01 - EP KR US)
Citation (search report)
- [X] EP 0992591 A2 20000412 - NIPPON STEEL CORP [JP]
- [A] EP 0662520 A1 19950712 - KAWASAKI STEEL CO [JP]
- [A] EP 0897016 A1 19990217 - NIPPON STEEL CORP [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 13 30 November 1998 (1998-11-30)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1149924 A2 20011031; EP 1149924 A3 20040128; EP 1149924 B1 20090715; DE 60139222 D1 20090827; KR 100479213 B1 20050325; KR 20010098841 A 20011108; US 2001032684 A1 20011025; US 6482271 B2 20021119
DOCDB simple family (application)
EP 01109432 A 20010423; DE 60139222 T 20010423; KR 20010022062 A 20010424; US 84101901 A 20010424